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Superconductor superior in dependency of critical current density on magnetic field angle

a superconductor and critical current density technology, applied in the direction of superconductors/hyperconductors, superconducting magnets/coils, magnetic bodies, etc., can solve the problem of insufficient dependence of conventional magnetic field angl

Inactive Publication Date: 2012-02-02
KYUSHU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]According to the present invention, it is possible to obtain a previously nonexistent superconductor with little dependency of the critical current density on the magnetic field.

Problems solved by technology

The conventional magnetic field angle dependency has been insufficient.

Method used

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  • Superconductor superior in dependency of critical current density on magnetic field angle
  • Superconductor superior in dependency of critical current density on magnetic field angle
  • Superconductor superior in dependency of critical current density on magnetic field angle

Examples

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example

[0032]A target comprised of GdBa2Cu3O7+ZrO2 (5 mol %) and GdBa2Cu3O7+BaZrO3 (5 mol %) mixed together was fabricated and attached to a PLD apparatus.

[0033]After this, under conditions of a pulse energy of 500 to 600 mJ (corresponding to 2 to 3 J / cm2), frequency of 177 Hz (4-plume), substrate temperature of 850 to 900° C., and process pressure of 600 mTorr (=80 Pa), the pulsed laser deposition method (PLD method) was used to form a film and prepare a superconductor film.

[0034]For the substrate, a biaxially oriented substrate including a Gd2Zr2O7 layer formed by the ion-beam assisted deposition method (IBAD method) (PLD—CeO2 / IBAD—Gd2Zr2O7 / Ni superalloy) was used.

[0035]The prepared superconductor film was sliced by an FIB apparatus to prepare plate-shaped and pillar-shaped STEM samples. The STEM-CT method was used to analyze the dispersed state of the BZO nanorods.

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Abstract

An oxide superconducting tape comprised of a substrate on which a GdBa2Cu3O7-δ (δ=0 to 1) superconductor layer is formed, characterized in that,inside of said superconductor layer, columnar or rod-shaped BaZrO3 crystals are dispersed such that they are inclined from c-axis of the superconducting crystals and that BaZrO3 crystals adjacent in longitudinal directions are in a skew position.

Description

TECHNICAL FIELD[0001]The present invention relates to a superconductor comprised of a type II superconductor inside of which ordinary conducting particles are dispersed, more particularly relates to a superconductor with a high critical current density and with a small magnetic field angle dependency.BACKGROUND ART[0002]Various studies have been made on a superconductor film comprised of a type II superconductor, that is, an oxide superconductor film, in which a plurality of columnar or rod-shaped crystals extending in a film thickness direction and comprised of an ordinary conducting substance, called “nanorods”, are dispersed and in which these nanorods are used as pinning centers.[0003]It is known that such a superconductor film has a high critical current density due to nanorods which are formed internally acting as effective pinning centers.[0004]PLT 1 discloses, as a superconductor film with a high critical current density and a small magnetic field angle dependency, a structu...

Claims

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Application Information

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IPC IPC(8): H01L39/12H01L39/08
CPCH01L39/2483H01L39/126H10N60/857H10N60/0828
Inventor KANEKO, KENJIMATSUSHITA, TERUOIBI, AKIRAYOSHIZUMI, MASATERUIZUMI, TERUOSHIOHARA, YUH
Owner KYUSHU UNIV